OEM Carrier 40VA Control Transformer HT01BD236 for Model C50A502061

This is the factory OEM replacement transformer (part number HT01BD236) for the Carrier C50A502061 commercial rooftop unit. The transformer is the backbone of your HVAC control circuit — it steps line voltage (120V) down to the 24V signal required by your thermostat, contactors, gas valve, and control board. When the transformer fails, absolutely nothing in the low-voltage control circuit will respond: the thermostat goes dead, the system won't call for heating or cooling, and no safety controls can operate. A failed transformer is often misdiagnosed as a bad control board, making correct identification essential before ordering expensive components.

• Specs: 40VA rating | 120V primary input | 24V secondary output | Class 2 low-voltage output | Factory-matched to Carrier C50A502061 electrical specifications
• OEM vs Generic: OEM transformers from Carrier carry exact VA ratings and insulation class ratings required by the factory design. Generic replacements frequently run undersized VA ratings, causing the transformer to overheat, trip its internal fuse, or fail prematurely under peak load conditions.
• Install difficulty: 2/5 — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Confirm 0V at primary terminals before touching wiring. Photograph all wire connections before disconnecting the old unit.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse.

Compatibility: Designed specifically for the Carrier C50A502061 commercial rooftop packaged unit. Verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate before ordering — mismatched VA ratings can damage downstream control components. Our parts specialists are available to confirm fitment prior to purchase. Order today and your part ships the same business day.